Pop's system is the only reason Spurs is contending at the moment.
Phil Jackson is the best at coaching ego maniac, elite line-ups.
Pop turned mediocre rosters into pure gold. 2003 Spurs was very under-talented compared to Lakers. 2008 and beyond Spurs no longer have the dump-it-to-Duncan play when things are tough, and Pop managed to completely revamp Spurs offense. He honest does a better job than anyone with the very weak cards he has. Yes he HAS to take more risks than other coaches (resting his extremely old big three), but more often than not they pay off.
Spurs currently does not have a true elite player yet still putting up great records. If only Pop and Duncan were in a bigger market they would have almost certainly won more.